An understanding of the science of light has led to ways of correcting faulty vision, and improving vision to study objects that are too small or too distant to be seen by the unaided eye. The performance of instruments such as microscopes, telescopes, an

An understanding of the science of light has led to ways of correcting faulty vision, and improving vision to study objects that are too small or too distant to be seen by the unaided eye. The performance of instruments such as microscopes, telescopes, an